Ratchet-drill



T. N. SCOTT.

BATGHBT DRILL.

(ModeL) No. 401,465. Patented Apr. 16, 1889.

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UNITED STATES PATENT O-rricn.

THEODORE NELSON SCOTT, OF BROOKLYN, NEYV YORK.

RATCH ET-DRI LL.

SPECIFICATION forming part of Letters Patent No. 401,465, dated April 16, 1889. Application filed January 21, 1889. Serial No. 297,070. (Model) To all whom it may concern.-

Be it known that I, THEODORE NELsoN SCOTT, a citizen of the United States, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Ratchet- Drills, of which the following is a specification.

My invention relates especially to devices employed for drilling holes in metal by handpower, and has for its object the provision of a ratchet-drill which may be used in any position, and wherein any movement of the actuating-lever will turn the drill in the desired direction and automatically feed the same.

To attain the desired end, my. invention consists, essentially, in a drill-chuck havinga ratchet thereon, said drill-chuck being mounted in a main frame and having independent movable arms projecting from each side thereof, each of said arms bearing a spring-pawl and being connected to a hub, shaft, or cam, to which the operating-handle is secured; and my invention also involves certain other novel and useful combinations or arrangements of parts and peculiarities of construction and operation, all of which will be hereinafter first fully described, and then pointed out in the claims.

In the drawings, Figure 1 is a side elevation of my improved drill, and Fig. 2 is a front elevation thereof. Fig. 3 is a vertical sectional view. Fig. 4: is a view at line a of Fig. 1. Fig. 5 is a top plan view.

Like letters of reference indicate corresp 0nding parts.

A is the main frame, provided with a handle, B, for holding the device.

0 is a drill-chuck having a screw-threaded stem, 1), and a ratchet, E.

Mounted upon the chuck 0 upon the main frame is a shell, F, removably held in place by a bayonet-catch, G. (Particularly illustrated in Fig. 1.)

H is a slot in the wall of shell F.

I is the feeding-tube, sliding in shell F and held against rotation by a screw or pin, J, playing in slot H. Feed-tube I is provided with internal screw-threaded portions, K K, wherewith stem 1) engages.

L L are independent movable arms attached to or forming parts of rings encircling the chucks, said arms being connected to a hub or cam, M, by links N.

O is an operating-handle secured to hub M.

PP are pawls pivoted upon arms L andheld in engagement with ratchet E by springs B.

When the parts above described are assembled for use, the operation of my device is as follows: A drill being secured in the chuck, the feeding-tube I is screwed down to its lowest position and the point of said tube is placed against any convenient bearing. The operating-handle O is then moved to the right or left, backward and forward, either movement turning the ratchet continuously in one direction and automatically feeding the drill.

It will be seen that as both of the pawlbearing arms are of the same construction and arrangement the amount of movement imparted to the drill by each pawl is the same, and when used in corners or cramped positions the device may be operated by moving the lever 0 upon either side of the holdinghandle, and no motion is lost by the return of the said lever, as is usually the case in drills of this description.

If it is desired to turn the drill withoutfeedin g the same, the shell F is released from the main frame and permitted to turn with the drill, and when it is necessary to screw the feedin g-shell home the same is quickly accomplished byreleasin g the shell in like manner.

Having now fully described my invention, what I claim is- 1. A ratchet-d rill chuck mounted in a main frame provided with aholding-handle, in combination with independent movable armsbearing pawls and projecting at each side of the drill-chuck, said arms being connected to an operating-hub having a handle secured thereto, substantially as shown and described.

2. The combination, with the drill-chuck bearing a ratchet-wheel, as set forth, of rings encircling said chuck and having projecting arms whereon are pivoted pawls, the extremities of said arms being connected to an operating hub, cam, or shaft, substantially as shown and described.

3. The combination, with the main frame and the drill-chuck provided with a screwthreaded stem, of a detachable shell mounted upon the main frame and containing the feeding tube, substantially as shown and described.

4. The combination, with the feeding-tube having an internal screw-thread wherein the stem of the drill-chuck engages, and an outwardly-projecting pin or screw, of the surrounding shell having a slot through which said pin or screw projects, and a catch for detachably securing said shell to the main frame, substantially as shown and described.

5. A ratchet-drill consisting of a main frame provided with a holding-handle, a drill-chuck whereon is located a ratchet, rings encircling the drill-chuck and bearing arms whereon. spring-pawls are pivoted,a hub to which the arms are connected by links, said hub having THEODORE NELSON SCOTT.

Witnesses:

A. M. PIERCE, L. E. WADE. 

